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Sketch C, showing the progress of the survey in Section No. III from 1843 to 1856

U.S. Coast Survey, A.D. Bache, Superintendent.
Online; Map; Government Document
1 map ; 86 x 58 cm.
Mathematical info
Scale 1:400,000
[Washington, D.C.?] : U.S. Coast Survey, 1856.
Includes text, "Notes."
In upper left margin: No. 7.
At head of title: U.S. Coast Survey, A.D. Bache Superintendent.
Shows triangulation and outlines of topographic and hydrographic sheets completed for the Chesapeake Bay, James, York , Rappahannock Rivers and the District of Columbia.
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